java.io
Class LineNumberReader

A buffered character-input stream that keeps track of line numbers.
This class defines methods void setLineNumber(int) and
int getLineNumber() for setting and getting the current
line number respectively.

By default, line numbering begins at 0. This number increments as data is
read, and can be changed with a call to setLineNumber(int).
Note however, that setLineNumber(int) does not actually change the current
position in the stream; it only changes the value that will be returned
by getLineNumber().

A line is considered to be terminated by any one of a line feed ('\n'), a carriage
return ('\r'), or a carriage return followed immediately by a linefeed.

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